Hyperloop: Los Angeles to San Francisco in 30 minutes

Almost a year after Elon Musk, chief executive of Tesla Motors (TSLA)
and SpaceX, first floated the idea of a superfast mode of
transportation, he has finally revealed the details: a solar-powered,
city-to-city elevated transit system that could take passengers and cars
from Los Angeles to San Francisco in 30 minutes. In typical Musk
fashion, the Hyperloop, as he calls it, immediately poses a challenge to
the status quo—in this case, California's $70 billion high-speed train
that has been knocked by Musk and others as too expensive, too slow, and
too impractical.